Improvement in fabrics for carpets



UNITED STATES ATENT EEICE..

WILLIAM WALLACE, CE PHILADELPHIA, PENNSYLVANIA, ASSICNCE To HIMsELr` AND CHARLES MGALLISTEE, A0F SAME PLACE.

IMPROVEMENT IN FABRICS FOR CARPETS.

Specilication forming part of Letters Patent No. 156,610, dated November 3, 1874; application filed June 18, 1874.

To all whom it may concern:

Be it known that I, WILLIAM WALLACE, of Philadelphia, Pennsylvania, have invented an Improved Fabric, of which the following is a specilication: l

My invention relates to an improvement in the damask-carpet fabric, for which reissued Letters Patent N o. 4,904 were granted to myself and Charles McAllister, as my assignecs, on the 14th day of May, 1872 and the object of my said improvement is to produce a welldefined pattern upon both the face and back of the fabric, in three distinct shades or colors, which shall appear upon the same line in the direction of the length of the fabric.

I attain this object by employing warpthreads A of three distinct shades or colors, one-third of which are raised in sets for the passage of a thick filling-thread, B, and twothirds for the passage of a secondthick fillingthread, B', or viceversa, while the said sets of warp-threads, after having been thus raised for the thick threads, are separated for the passage of a single thin filling-thread, D, in the manner described in my aforesaid patent, and as illustrated by the diagram, Fig. l., of the accompanying drawing.

In my aforesaid patented fabric, aline surface and compact texture were obtained by disposing the threads in the manner illus trated by the diagram, Fig. 2, in Which- A A represent the warp-threads B, thethick lling-threads; and D, the fine filling-threads,

the main peculiarity of the fabric being the separation, for the reception of the thin filling, ofthe sets of Warp-threads which were raised for the thick filling. For instance, the sets of Warp-threads a a' and b b' which were raised for the thick lling thread B were afterward separated for the thin filling-thread D. In this fabric, also, the warp for the thick filling was controlled by jacquard apparatus, which determined the character of the pattern,while the warp for the thin filling was under the contro] of separate mechanism independent of the jacquard. Warp-threads of two distinct shades or colors were also employed, and these were so disposed as to produce a pattern upon the back, as Well defined as that upon the colors, which appear on the same line in the direction of the length of the fabric.

In the present instance, the warp-threads A I A', 85e., are arranged in groups of six threads each, which are again subdivided into three sets, a a', b b', and d d', all of which pass through one space in the reed, and each of these threads may consist of one or of several strands. There are two thick fillingthreads, B and B', for every single thin iillin gthread D, and the warp is so controlled by jacquard apparatus for the thick filling that if one-third is raised for the thread B, two-thirds must be raised for the next succeeding thread B', or vice versa.

In Fig. l, for instance, the sets of threads, a a', which constitute one--third of the Warp, have been raised for the thick thread B, and thesets of threads a a' and b b', constituting twofthirds of the warp, have been' raised for the next thick lilling-thread B', the consequence being that when the threads are beaten up the warps a a' will appear upon one face of the fabric, and the warps cl d', of a different shade or color, upon the opposite fa'ce, while the intermediate warps b b' will, in this case, be concealed within the body of the fabric. The result of this manipulation 'of the warp-threads in respect to each pair of thick filling-threads must be the production of precisely similar designs at opposite sides of the fabric, except that the colors will be reversed.

The Warp-threads are controlled for the reception of the thin filling-threads D by separate harness or shafts in the Nmanner described in my aforesaid patent of May 14, 1872, so that each set of warps raised for the thick filling shall be afterward separated for the thin filling. For instance, the warps a a', b b', and d the passage of asueoeeding thick illingthread, or vice versa, and in which the sets of Warps thus raised are afterward separated for the passage of a thin iiling-thread, all as and for the purpose specified.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing Witnesses.

WILLIAM WALLACE. Witnesses WM. A. STEEL, THoMAs MeILvAlN. 

